Floor maintenance machine



FIG. 1 is a front perspective view of a floor maintenance machineshowing our new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof.

The ornamental design for a floor maintenance machine, substantially asshown.